This
is
the
FHIR
R4
Mixed
Normative/Trial
Use
Ballot
#1,
and
the
version
for
the
Cologne
Connectathon
in
May
2018.
The
current
version
is
R3
.
See
the
ballot
introduction
for
details
about
the
ballot.
For
a
full
list
of
available
versions,
see
the
Directory
of
published
versions
and
Timelines
for
an
explanation
of
STU
and
other
statuses.

A
few
code
lists
that
FHIR
defines
are
hierarchical
-
each
code
is
assigned
a
level.
For
value
sets,
levels
are
mostly
used
to
organize
codes
for
user
convenience,
but
may
follow
code
system
hierarchy
-
see
Code
System
for
further
information

Source

The
source
of
the
definition
of
the
code
(when
the
value
set
draws
in
codes
defined
elsewhere)

Code

The
code
(used
as
the
code
in
the
resource
instance).
If
the
code
is
in
italics,
this
indicates
that
the
code
is
not
selectable
('Abstract')

Display

The
display
(used
in
the
display
element
of
a
Coding
).
If
there
is
no
display,
implementers
should
not
simply
display
the
code,
but
map
the
concept
into
their
application